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Hydro-Jetting & Dart-Shooting for Heat Exchanger Cleaning

Heat Exchange

Their servicing page describes mechanical cleaning of heat exchanger tubes using high-pressure water jetting (hydro-jetting). They mention pressures from 200 up to 7,000 bar for removing hard, brittle deposits.

Hydro-jetting is very efficient for mechanical cleaning during large turnarounds.

Cleaning shell-and-tube heat exchangers by using high-pressure water blasting (jetting) with flexible hoses or stainless steel lances or dart shorting process

The pressures up to 2,500 bar (very high) for effective removal of fouling.

Plate Type Exchanger

plate & frame heat exchangers, they recommend chemical descaling (circulating acid-based descaler) rather than projectile cleaning, to protect the plates and gaskets.

Their service removes scale, rust, residue, and other deposits from exchanger tubes.

The “hydro blasting heat exchanger” service ultra-high-pressure water (no abrasives) to clean tube bundles / shell side.

They have special lances (rigid or rotary) to reach hard-to-clean areas; their system is also safer (operator remote) and avoids secondary contamination.

plate-type exchangers, then use a specialized chemical cleaning technique descaling agent through the plate channels, or disassembling the plates and cleaning each.

Method Statement / Maintenance

A “Method Statement for Maintenance of Heat Exchangers” describes how to carry out hydro-jetting: includes safety (shielding), use of air to blow out debris, and power-brush cleaning + high-pressure water jets.

Hydro-jetting Pressure very high pressures (up to 3,000 bar) are used for very hard deposits.

Lance Types flexible hoses or stainless lances are used to navigate inside tube bundles.

Dart Cleaning tube cleaning involves launching (darts) through tubes; very effective for scale, but for plate-type exchangers, darts cleaning is not ideal (risk to gaskets / plates), so chemical descaling is preferred.